CN102205267B - Method for producing fine coal, pyrite concentrate and building sand by using high-sulfur coal refuses - Google Patents
Method for producing fine coal, pyrite concentrate and building sand by using high-sulfur coal refuses Download PDFInfo
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Abstract
The invention discloses a method for producing fine coal, pyrite concentrate and building sand by using high-sulfur coal refuses. The method comprises the following steps: taking coal refuses; after crushing the coal refuses, adding water into the crushed coal refuses till the mass percent of the coal refuses is 20-40%; sending the mixture into an adjusting groove; adding No.2 flotation agent oil and paraffin into the adjusting groove, and then mixing and stirring, thereby acquiring a slurry; preparing the fine coal by floating and separating the slurry; preparing the pyrite concentrate by reselecting and separating sulfur-containing moisture tail sands under the action of waterpower; and preparing the building sand by reselecting and separating the moisture tail sands under the action of waterpower. By using the method, the waste high-sulfur coal refuses are efficiently utilized and are converted into beneficial industrial raw materials without regeneration pollution, thereby being beneficial to environmental protection. The method has the advantages that the preparation process is simply, conveniently and easily operated, the industrial production is easily realized, the practicability is high, and the economic benefit and environmental benefit are significant.
Description
Technical field
The invention belongs to the processing of natural stone, relate to a kind of method with high sulfur coal gangue production cleaned coal, pyrite concentrate and building sand.Be applicable to high sulfur coal gangue production cleaned coal, pyrite concentrate and building sand.
Background technology
High sulfur coal gangue is the attached product refuse during high-sulfur coal enterprise produces, and contains coal 20-30% under the general state, sulfur-bearing 2-6%.Show according to relevant data, only discarded amount every year of each mineral bureau's jurisdiction colliery high sulfur coal gangue of Chongqing City is with the megaton quantity growth.One of sulfur-bearing percentage in the gangue, but just spontaneous combustion under nature, sulfur-bearing is greater than 3 percent just fully spontaneous combustions.The sulfur dioxide that spontaneous combustion produces forms acid rain and has a strong impact on ecology, contaminated environment.In the prior art, gangue generally is used for the spoil generating or is used as brickmaking fuel.Be used for the spoil generating, since the increasing of environmental protection dynamics, the sulfur dioxide that the power plant of burning high sulfur coal gangue discharges in the time of must doing the burning of transforming agent absorption spoil with calcium oxide; But the price of calcium oxide is by about hundred yuan one ton of one ton of rise to four of dozens of yuan in past, if add 100 to 150 kilograms of calcium oxide in the gangue of one ton of sulfur-bearing 4 percent, the value of its calcium oxide is far longer than the value of gangue; And the reaction of calcium oxide and sulfur dioxide is an endothermic reaction, and the calorific value that the gangue reaction is produced greatly reduces, even puts out stove; Therefore, high sulfur coal gangue is thoroughly eliminated as fuel used to generate electricity.As brickmaking fuel, also atrophy consumption day by day as the interior refuelling of real core shale brick, is high sulfur coal gangue to be pulverized be fine powder, adds in the ground and stirs base, fires carbon spontaneous combustion in the middle base and Cost reduction; But the lighting trend of wall body building material in the city, real core shale brick withdraws from the skyscraper materials industry substantially or fully.Therefore, it is impossible to utilize nearby, and the utilization of long-distance transport high sulfur coal gangue is more impossible! Therefore, the harmless treatment of high sulfur coal gangue is the great and urgent environmental issue of high-sulfur faced by coal enterprises!
Summary of the invention
Purpose of the present invention is intended to overcome above-mentioned deficiency of the prior art, turns waste into wealth, and a kind of method with high sulfur coal gangue production cleaned coal, pyrite concentrate and building sand is provided.
Content of the present invention is: a kind of method with high sulfur coal gangue production cleaned coal, pyrite concentrate and building sand is characterized in that comprising the following steps:
A, preparation slip: getting 1 ton of gangue, being crushed to granularity is the 80-120 order, the mass percentage content that adds water to gangue is 20-40%, send in the adjustment tank, (manufacturing enterprise has: Longxin, Zhejiang chemical industry Co., Ltd to add No. two oil of flotation agent (or claiming No. 2 ore dressing oil, No. two oil, ore dressing pine camphor wet goods of beneficiation reagent) again; Zibo City Boshan chemical industry Co., Ltd; Jiangnan District of Tonglu County, Hangzhou temmoku pine tar refinery; Baiyin company ore dressing pharmaceutical factory etc.) 40-80 gram, kerosene 800 grams-1200 gram (manufacturing enterprises: each oil plant of PetroChina Company Limited.; Each oil plant of China Petrochemical Industry), make slip through mixing; No. two oil are foaming agent, and kerosene is the collecting agent of coal; In this step the consumption of gangue, No. two oil of flotation agent, kerosene etc. can in described quality be ratio according to the inventory taken amount in the actual production, rear with;
B, FLOTATION SEPARATION prepares cleaned coal: the slip in the adjustment tank is sent into roughly selected in the flotation device, coal enters under kerosene captures in the foam of No. two oil formation of flotation agent, after scraping, scraper plate through roughly selecting flotation device enters in the precision sorting flotation machine, add again No. two oily 20-40 grams of flotation agent in the precision sorting flotation machine, (coal collecting agent) kerosene 40-800 gram, scraper plate through precision sorting flotation machine scrapes moisture cleaned coal, moisture cleaned coal (can be the high-speed full-automatic centrifuge through centrifuge, or other prior art separation equipment) (in the mass percent composition of this head coal product, carbon containing is greater than 80% namely to make head coal product after the dehydration, moisture less than 8%, sulfur-bearing is less than 0.2%); The remaining moisture tailings of sulfur-bearing is discharged from the Water-drainage sand mouth of precision sorting flotation machine bottom after scraping moisture cleaned coal, enters next procedure;
Describedly roughly select flotation device and precision sorting flotation machine all mainly is comprised of flotation cell, scraper plate, agitating device and power set, same prior art;
C, the waterpower Gravity separation prepares pyrite concentrate: the moisture tailings of sulfur-bearing is sent into spiral chute A, and (manufacturing enterprise of this spiral chute equipment has: Shicheng County, Jiangxi mining machinery plant, Henan Fangda Industrial Co., Ltd., Hebei KNT FRP Co., Ltd. etc., same prior art) carries out the waterpower Gravity separation in, isolated heavy slurry carries out the waterpower Gravity separation through spiral chute A or spiral chute B again, isolated heavy slurry carries out the waterpower Gravity separation through spiral chute A or spiral chute C again, isolated heavy material is moisture pyrite concentrate, and moisture pyrite concentrate drying (natural drying or oven dry) namely makes the pyrite concentrate product; The slurry that the isolated proportion of each spiral chute is little is moisture tailings, moisture tailings is converged in the water tail-box enter next process;
D, waterpower Gravity separation prepare building sand: moisture tailings is entered the silt particle separate hydrocyclone by lift greater than 50 meters high-power high-lift water sand pump direct extraction, and (manufacturer of this equipment has: Zibo thyrite Industrial Pottery and Porcelain Co., Ltd; Xi'an JinCheng Vibrator Technology Co., Ltd.; Wuhu gold boomerang machinery Co., Ltd etc., same prior art) desliming, mud and fine sand are that building sand is discharged from silt particle separate hydrocyclone bottom by the discharge of cyclone top, silica sand, drying (natural drying or oven dry) namely makes building sand.
The muddy water of discharging from silt particle separate hydrocyclone top enters mud sump, and water enters after mud sump nature supernatant that circulating water pool is reusable, mud is regularly cleared up go back to the field, contains a large amount of microorganisms owing in the gangue, mud not only can go back to the field but also can be used as Fertilizer application;
The mass percentage content of silica is greater than 80% in the building sand that makes, in silica sand, add 10-30% cement, can make it to become concrete, grass meal after the flake asbestos of interpolation 1-5% or straw, wheat straw are pulverized in the concrete etc., through mechanical compaction, the natural drying rear front surface of product sprays the products such as the encaustic tile that namely can be made into behind the pigment of all kinds under the various model states, azulejo; Building sand can also sell as construction material.
In the content of the present invention: described gangue is to contain the mass percent example to be the gangue of 20-30% coal, 2-6% sulphur and 30-50% silicon.
In the content of the present invention: described step c waterpower Gravity separation prepares pyrite concentrate and replaces with:
The moisture tailings of sulfur-bearing is sent into spiral chute, and (manufacturing enterprise of this spiral chute equipment has: Shicheng County, Jiangxi mining machinery plant, Henan Fangda Industrial Co., Ltd., Hebei KNT FRP Co., Ltd. etc., same prior art) carry out the waterpower Gravity separation in, isolated heavy slurry enters the shaking table (manufacturing enterprise of this equipment: Shicheng County, Jiangxi Province mining machinery again; Yunnan Province's perseverance inspires confidence in Mining machinery Manufacturing Co., Ltd; Shicheng County nonferrous mine machinery plant etc., same prior art) carry out the waterpower Gravity separation in, isolated heavy material is moisture pyrite concentrate, and moisture pyrite concentrate drying (natural drying or oven dry) namely makes the pyrite concentrate product; The slurry that each spiral chute and the isolated proportion of shaking table clearance hole are little is moisture tailings, moisture tailings is converged in the water tail-box enter next process;
The waterpower gravity treatment connection that uses 1-N (N is less than 10) platform spiral chute to add respectively the combination of 1-N (N is less than 10) platform shaking table selects the unit can reduce cost and reduce production costs.Sulfur-bearing 12% left and right sides chats that a waterpower spiral chute gravity treatment obtains directly enters the gravity treatment of shaking table waterpower, can disposablely obtain the pyrite concentrate of sulfur-bearing 38% to 42% from shaking table, flow process has been shortened in the choosing of waterpower gravity treatment connection, reduce investment, can save the electric power of comparing whole waterpower spiral chute gravity treatment 80%, 60% equipment investment.
In the content of the present invention: described step c waterpower Gravity separation prepares pyrite concentrate and replaces with: (manufacturing enterprise of this spiral chute equipment has: Shicheng County, Jiangxi mining machinery plant to adopt 10 spiral chutes, Henan Fangda Industrial Co., Ltd., Hebei KNT FRP Co., Ltd. etc., same prior art) installs by echelon is concentrated, its quantity ratio is 4: 3: 2: 1, that is: take the spiral chute of 4 series connection as first group (the moisture tailings of sulfur-bearing is sent into first group of spiral chute and carried out the process of waterpower Gravity separation with claim 1 step c), take the spiral chute of 3 series connection as second group, take the spiral chute of 2 series connection as the 3rd group, take 1 spiral chute as the 4th group;
With the moisture tailings of sulfur-bearing after first group of spiral chute carries out the waterpower Gravity separation, isolated heavy slurry is sent into second group of spiral chute by the water sand pump again and is carried out the waterpower Gravity separation, isolated heavy slurry is sent into the 3rd group of spiral chute by the water sand pump again and is carried out the waterpower Gravity separation, isolated heavy slurry is sent into the 4th group of spiral chute by the water sand pump again and is carried out the waterpower Gravity separation, isolated heavy material is moisture pyrite concentrate, and moisture pyrite concentrate drying (natural drying or oven dry) namely makes pyrite concentrate product (can obtain sulfur-bearing greater than 39% pyrite concentrate by last spiral chute gape through above-mentioned four echelon waterpower gravity treatments are concentrated); The slurry that the isolated proportion of each spiral chute is little is moisture tailings, moisture tailings is converged in the water tail-box enter next process.
Compared with prior art, the present invention has following characteristics and beneficial effect:
(1) adopts the present invention, the discarded object high sulfur coal gangue is utilized effectively, become cleaned coal, pyrite concentrate and building sand, high sulfur coal gangue is become the raw material of industry of substantial economics, water for industrial use can be recycled in the production, does not produce regeneration of contaminated, is beneficial to environmental protection;
(2) adopt the present invention, select sulphur to use gravity treatment but not flotation mainly is based on the recirculation of water, select sulphur with floatation again such as the mine tailing behind the flotation coal, select the waste water of sulphur just to only have discharging, if recycle this wet concentration coal, the collecting agent of sulphur can capture sulphur in the high sulfur coal gangue and enter among the cleaned coal, makes the process failure; Decades ago, the tailings firing refractory bricks after having scientist with coal separation is died without known cause owing to silicone content in the tailings is unstable; Silica sand among the present invention after the cyclone desliming adds encaustic tile, the azulejo that cement etc. becomes can be become behind the concrete under the various models after mechanical compaction sprays pigment of all kinds, these building materials are just meeting city and rural building needs today; Along the day by day exhaustion of rivers sand, the building sand that adopts the present invention to obtain will become one of important construction material source;
(3) product preparation process of the present invention is simple, and operation is easy, and easily operation is easy to suitability for industrialized production and implements, and is practical, has great economic benefit and environmental benefit.
The specific embodiment
Embodiment given below intends so that the invention will be further described; but can not be interpreted as it is limiting the scope of the invention; the person skilled in art to some nonessential improvement and adjustment that the present invention makes, still belongs to protection scope of the present invention according to the content of the invention described above.
Embodiment 1:
A kind of method with high sulfur coal gangue production cleaned coal, pyrite concentrate and building sand comprises the following steps:
A, preparation slip: getting 1 ton of gangue, being crushed to granularity is the 80-120 order, the mass percentage content that adds water to gangue is that 30% (that is: the mass percentage content of gangue is 30%, remainder is water), send in the adjustment tank, (manufacturing enterprise has: Longxin, Zhejiang chemical industry Co., Ltd to add No. two oil of flotation agent (or claiming No. 2 ore dressing oil, No. two oil, ore dressing pine camphor wet goods of beneficiation reagent) again; Zibo City Boshan chemical industry Co., Ltd; Jiangnan District of Tonglu County, Hangzhou temmoku pine tar refinery; Baiyin company ore dressing pharmaceutical factory etc.) 60 grams, kerosene 1000 gram (manufacturing enterprises: each oil plant of PetroChina Company Limited.; Each oil plant of China Petrochemical Industry), make slip through mixing; No. two oil are foaming agent, and kerosene is the collecting agent of coal;
B, FLOTATION SEPARATION prepares cleaned coal: the slip in the adjustment tank is sent into roughly selected in the flotation device, coal enters under kerosene captures in the foam of No. two oil formation of flotation agent, after scraping, scraper plate through roughly selecting flotation device enters in the precision sorting flotation machine, add again No. two oil of foaming agent 30 grams in the precision sorting flotation machine, (coal collecting agent) kerosene 420 grams, scraper plate through precision sorting flotation machine scrapes moisture cleaned coal, moisture cleaned coal (can be the high-speed full-automatic centrifuge through centrifuge, or other prior art separation equipment) (in the mass percent composition of this head coal product, carbon containing is greater than 80% namely to make head coal product after the dehydration, moisture less than 8%, sulfur-bearing is less than 0.2%); The remaining moisture tailings of sulfur-bearing is discharged from the Water-drainage sand mouth of precision sorting flotation machine bottom after scraping moisture cleaned coal, enters next procedure;
Describedly roughly select flotation device and precision sorting flotation machine all mainly is comprised of flotation cell, scraper plate, agitating device and power set, same prior art;
C, the waterpower Gravity separation prepares pyrite concentrate: the moisture tailings of sulfur-bearing is sent into spiral chute A, and (manufacturing enterprise of this spiral chute equipment has: Shicheng County, Jiangxi mining machinery plant, Henan Fangda Industrial Co., Ltd., Hebei KNT FRP Co., Ltd. etc., same prior art) carries out the waterpower Gravity separation in, isolated heavy slurry carries out the waterpower Gravity separation through spiral chute A or spiral chute B again, isolated heavy slurry carries out the waterpower Gravity separation through spiral chute A or spiral chute C again, isolated heavy material is moisture pyrite concentrate, and moisture pyrite concentrate drying (natural drying or oven dry) namely makes the pyrite concentrate product; The slurry that the isolated proportion of each spiral chute is little is moisture tailings, moisture tailings is converged in the water tail-box enter next process;
D, waterpower Gravity separation prepare building sand: moisture tailings is entered the silt particle separate hydrocyclone by lift greater than 50 meters high-power high-lift water sand pump direct extraction, and (manufacturer of this equipment has: Zibo thyrite Industrial Pottery and Porcelain Co., Ltd; Xi'an JinCheng Vibrator Technology Co., Ltd.; Wuhu gold boomerang machinery Co., Ltd etc., same prior art) desliming, mud and fine sand are that building sand is discharged from silt particle separate hydrocyclone bottom by the discharge of cyclone top, silica sand, drying (natural drying or oven dry) namely makes building sand.
The muddy water of discharging from silt particle separate hydrocyclone top enters mud sump, and water enters after mud sump nature supernatant that circulating water pool is reusable, mud is regularly cleared up go back to the field, contains a large amount of microorganisms owing in the gangue, mud not only can go back to the field but also can be used as Fertilizer application;
Embodiment 2-8:
A kind of method with high sulfur coal gangue production cleaned coal, pyrite concentrate and building sand comprises the following steps:
A, preparation slip: getting 1 ton of gangue, being crushed to granularity is the 80-120 order, the mass percentage content that adds water to gangue is that (that is: the mass percentage content of gangue is 20-40% to 20-40%, remainder is water), send in the adjustment tank, (manufacturing enterprise has: Longxin, Zhejiang chemical industry Co., Ltd to add No. two oil of flotation agent (or claiming No. 2 ore dressing oil, No. two oil, ore dressing pine camphor wet goods of beneficiation reagent) again; Zibo City Boshan chemical industry Co., Ltd; Jiangnan District of Tonglu County, Hangzhou temmoku pine tar refinery; Baiyin company ore dressing pharmaceutical factory etc.) 40-80 gram, kerosene 800 grams-1200 gram (manufacturing enterprises: each oil plant of PetroChina Company Limited.; Each oil plant of China Petrochemical Industry), make slip through mixing; No. two oil are foaming agent, and kerosene is the collecting agent of coal;
Among each embodiment, the concrete consumption of the mass percentage content of described gangue, No. two oil of flotation agent and kerosene sees the following form:
B, FLOTATION SEPARATION prepares cleaned coal: the slip in the adjustment tank is sent into roughly selected in the flotation device, coal enters under kerosene captures in the foam of No. two oil formation of flotation agent, after scraping, scraper plate through roughly selecting flotation device enters in the precision sorting flotation machine, add again No. two oily 20-40 grams of flotation agent in the precision sorting flotation machine, (coal collecting agent) kerosene 40-800 gram, scraper plate through precision sorting flotation machine scrapes moisture cleaned coal, moisture cleaned coal (can be the high-speed full-automatic centrifuge through centrifuge, or other prior art separation equipment) (in the mass percent composition of this head coal product, carbon containing is greater than 80% namely to make head coal product after the dehydration, moisture less than 8%, sulfur-bearing is less than 0.2%); The remaining moisture tailings of sulfur-bearing is discharged from the Water-drainage sand mouth of precision sorting flotation machine bottom after scraping moisture cleaned coal, enters next procedure;
Among each embodiment, the concrete consumption of No. two oil of described flotation agent and kerosene sees the following form:
Describedly roughly select flotation device and precision sorting flotation machine all mainly is comprised of flotation cell, scraper plate, agitating device and power set, same prior art;
C, the waterpower Gravity separation prepares pyrite concentrate: the moisture tailings of sulfur-bearing is sent into spiral chute A, and (manufacturing enterprise of this spiral chute equipment has: Shicheng County, Jiangxi mining machinery plant, Henan Fangda Industrial Co., Ltd., Hebei KNT FRP Co., Ltd. etc., same prior art) carries out the waterpower Gravity separation in, isolated heavy slurry carries out the waterpower Gravity separation through spiral chute A or spiral chute B again, isolated heavy slurry carries out the waterpower Gravity separation through spiral chute A or spiral chute C again, isolated heavy material is moisture pyrite concentrate, and moisture pyrite concentrate drying (natural drying or oven dry) namely makes the pyrite concentrate product; The slurry that the isolated proportion of each spiral chute is little is moisture tailings, moisture tailings is converged in the water tail-box enter next process;
D, waterpower Gravity separation prepare building sand: moisture tailings is entered the silt particle separate hydrocyclone by lift greater than 50 meters high-power high-lift water sand pump direct extraction, and (manufacturer of this equipment has: Zibo thyrite Industrial Pottery and Porcelain Co., Ltd; Xi'an JinCheng Vibrator Technology Co., Ltd.; Wuhu gold boomerang machinery Co., Ltd etc., same prior art) desliming, mud and fine sand are that building sand is discharged from silt particle separate hydrocyclone bottom by the discharge of cyclone top, silica sand, drying (natural drying or oven dry) namely makes building sand.
The muddy water of discharging from silt particle separate hydrocyclone top enters mud sump, and water enters after mud sump nature supernatant that circulating water pool is reusable, mud is regularly cleared up go back to the field, contains a large amount of microorganisms owing in the gangue, mud not only can go back to the field but also can be used as Fertilizer application;
Embodiment 9:
Method with high sulfur coal gangue production cleaned coal, pyrite concentrate and building sand comprises the following steps:
A, preparation slip;
B, FLOTATION SEPARATION prepare cleaned coal;
C, waterpower Gravity separation prepare pyrite concentrate: described step c waterpower Gravity separation prepares pyrite concentrate and replaces with: the moisture tailings of sulfur-bearing is sent into spiral chute, and (manufacturing enterprise of this spiral chute equipment has: Shicheng County, Jiangxi mining machinery plant, Henan Fangda Industrial Co., Ltd., Hebei KNT FRP Co., Ltd. etc., same prior art) carry out the waterpower Gravity separation in, isolated heavy slurry enters the shaking table (manufacturing enterprise of this equipment: Shicheng County, Jiangxi Province mining machinery again; Yunnan Province's perseverance inspires confidence in Mining machinery Manufacturing Co., Ltd; Shicheng County nonferrous mine machinery plant etc., same prior art) carry out the waterpower Gravity separation in, isolated heavy material is moisture pyrite concentrate, and moisture pyrite concentrate drying (natural drying or oven dry) namely makes the pyrite concentrate product; The slurry that each spiral chute and the isolated proportion of shaking table clearance hole are little is moisture tailings, moisture tailings is converged in the water tail-box enter next process;
The waterpower gravity treatment connection that uses 1-N (N is less than 10) platform spiral chute to add respectively the combination of 1-N (N is less than 10) platform shaking table selects the unit can reduce cost and reduce production costs.Sulfur-bearing 12% left and right sides chats that a waterpower spiral chute gravity treatment obtains directly enters the gravity treatment of shaking table waterpower, can disposablely obtain the pyrite concentrate of sulfur-bearing 38% to 42% from shaking table, flow process has been shortened in the choosing of waterpower gravity treatment connection, reduce investment, can save the electric power of comparing whole waterpower spiral chute gravity treatment 80%, 60% equipment investment.
D, waterpower Gravity separation prepare building sand.
The other the same as in Example 1-8 is arbitrary, slightly.
Embodiment 10:
Method with high sulfur coal gangue production cleaned coal, pyrite concentrate and building sand comprises the following steps:
A, preparation slip;
B, FLOTATION SEPARATION prepare cleaned coal;
C, the waterpower Gravity separation prepares pyrite concentrate: described step c waterpower Gravity separation prepares pyrite concentrate and replaces with: (manufacturing enterprise of this spiral chute equipment has: Shicheng County, Jiangxi mining machinery plant to adopt 10 spiral chutes, Henan Fangda Industrial Co., Ltd., Hebei KNT FRP Co., Ltd. etc., same prior art) installs by echelon is concentrated, its quantity ratio is 4: 3: 2: 1, that is: take the spiral chute of 4 series connection as first group (the moisture tailings of sulfur-bearing is sent into first group of spiral chute and carried out the process of waterpower Gravity separation with claim 1 step c), take the spiral chute of 3 series connection as second group, take the spiral chute of 2 series connection as the 3rd group, take 1 spiral chute as the 4th group;
With the moisture tailings of sulfur-bearing after first group of spiral chute carries out the waterpower Gravity separation, isolated heavy slurry is sent into second group of spiral chute by the water sand pump again and is carried out the waterpower Gravity separation, isolated heavy slurry is sent into the 3rd group of spiral chute by the water sand pump again and is carried out the waterpower Gravity separation, isolated heavy slurry is sent into the 4th group of spiral chute by the water sand pump again and is carried out the waterpower Gravity separation, isolated heavy material is moisture pyrite concentrate, and moisture pyrite concentrate drying (natural drying or oven dry) namely makes pyrite concentrate product (can obtain sulfur-bearing greater than 39% pyrite concentrate by last spiral chute gape through above-mentioned four echelon waterpower gravity treatments are concentrated); The slurry that the isolated proportion of each spiral chute is little is moisture tailings, moisture tailings is converged in the water tail-box enter next process.
The other the same as in Example 1-8 is arbitrary, slightly.
In above-described embodiment: described gangue is to contain the mass percent example to be the gangue of 20-30% coal, 2-6% sulphur and 30-50% silicon.
In above-described embodiment: the mass percentage content of silica is greater than 80% in the building sand that makes, in silica sand, add 10-30% cement, can make it to become concrete, grass meal after the flake asbestos of interpolation 1-5% or straw, wheat straw are pulverized in the concrete etc., through mechanical compaction, the natural drying rear front surface of product sprays the products such as the encaustic tile that namely can be made into behind the pigment of all kinds under the various model states, azulejo; Building sand can also sell as construction material.
The invention is not restricted to above-described embodiment, content of the present invention is described all can implement and have described good result.
Claims (4)
1. the method with high sulfur coal gangue production cleaned coal, pyrite concentrate and building sand is characterized in that comprising the following steps:
A, preparation slip: getting 1 ton of gangue, being crushed to granularity is the 80-120 order, the mass percentage content that adds water to gangue is 20-40%, send in the adjustment tank, add again No. two oily 40-80 grams of flotation agent, kerosene 800 grams-1200 grams, make slip through mixing;
B, FLOTATION SEPARATION prepare cleaned coal: the slip in the adjustment tank is sent into roughly selected in the flotation device, coal enters in No. two oily foams that form of flotation agent under kerosene captures, the scraper plate through roughly selecting flotation device enters in the precision sorting flotation machine after scraping, add again No. two oily 20-40 grams of flotation agent, kerosene 40-800 gram in the precision sorting flotation machine, scraper plate through precision sorting flotation machine scrapes moisture cleaned coal, and moisture cleaned coal namely makes head coal product behind centrifuge dewatering; The remaining moisture tailings of sulfur-bearing is discharged from the Water-drainage sand mouth of precision sorting flotation machine bottom after scraping moisture cleaned coal, enters next procedure;
Describedly roughly select flotation device and precision sorting flotation machine all mainly is comprised of flotation cell, scraper plate, agitating device and power set;
C, waterpower Gravity separation prepare pyrite concentrate: with the moisture tailings of sulfur-bearing send into carry out among the spiral chute A waterpower Gravity separation, isolated heavy slurry again through spiral chute A or spiral chute B carry out the waterpower Gravity separation, isolated heavy slurry carries out the waterpower Gravity separation through spiral chute A or spiral chute C again, isolated heavy material is moisture pyrite concentrate, and moisture pyrite concentrate drying namely makes the pyrite concentrate product; The slurry that the isolated proportion of each spiral chute is little is moisture tailings, moisture tailings is converged in the water tail-box enter next process;
D, waterpower Gravity separation prepare building sand: moisture tailings is entered the desliming of silt particle separate hydrocyclone by lift greater than 50 meters high-power high-lift water sand pump direct extraction, mud and fine sand are discharged from silt particle separate hydrocyclone bottom by the discharge of cyclone top, silica sand, and drying namely makes building sand.
2. by the method with high sulfur coal gangue production cleaned coal, pyrite concentrate and building sand claimed in claim 1, it is characterized in that: described gangue is to contain the mass percent example to be the gangue of 20-30% coal, 3-6% sulphur and 30-50% silicon.
3. by claim 1 or 2 described methods with high sulfur coal gangue production cleaned coal, pyrite concentrate and building sand, it is characterized in that: described step c waterpower Gravity separation prepares pyrite concentrate and replaces with: the moisture tailings of sulfur-bearing is sent into carry out the waterpower Gravity separation in the spiral chute, isolated heavy slurry enters and carries out the waterpower Gravity separation in the shaking table, isolated heavy material is moisture pyrite concentrate, and moisture pyrite concentrate drying namely makes the pyrite concentrate product; The slurry that each spiral chute and the isolated proportion of shaking table clearance hole are little is moisture tailings, moisture tailings is converged in the water tail-box enter next process.
4. by claim 1 or 2 described methods with high sulfur coal gangue production cleaned coal, pyrite concentrate and building sand, it is characterized in that: described step c waterpower Gravity separation prepares pyrite concentrate and replaces with: adopt 10 spiral chutes to install by echelon is concentrated, its quantity ratio is 4: 3: 2: 1, that is: take the spiral chute of 4 series connection as first group, take the spiral chute of 3 series connection as second group, take the spiral chute of 2 series connection as the 3rd group, take 1 spiral chute as the 4th group;
With the moisture tailings of sulfur-bearing after first group of spiral chute carries out the waterpower Gravity separation, isolated heavy slurry is sent into second group of spiral chute by the water sand pump again and is carried out the waterpower Gravity separation, isolated heavy slurry is sent into the 3rd group of spiral chute by the water sand pump again and is carried out the waterpower Gravity separation, isolated heavy slurry is sent into the 4th group of spiral chute by the water sand pump again and is carried out the waterpower Gravity separation, isolated heavy material is moisture pyrite concentrate, and moisture pyrite concentrate drying namely makes the pyrite concentrate product; The slurry that the isolated proportion of each spiral chute is little is moisture tailings, moisture tailings is converged in the water tail-box enter next process.
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